Impatiophila forcipivalva Fu & Gao

Fu, Zhao, Toda, Masanori J., Li, Nan-Nan, Zhang, Ya-Ping & Gao, Jian-Jun, 2016, A new genus of anthophilous drosophilids, Impatiophila (Diptera, Drosophilidae): morphology, DNA barcoding and molecular phylogeny, with descriptions of thirty-nine new species, Zootaxa 4120 (1), pp. 1-100 : 52-54

19) Impatiophila forcipivalva Fu & Gao , sp. nov.

( Fig. 29 ; Pl. 3B; Pl. 6Q)

Diagnosis. Setae of middle row on 2nd costal section all weak, trichoid. Hindleg tibia with 1 black, apically blunt, stout spine at outer apex on underside. Tenth sternite 1/2 as wide as long, slightly wider dorsally, slightly concave on lateral margins, medially projected on dorsal margin ( Fig. 29 D). Oviscapt valve distally narrowing in ventral view, without distinct lateral flap ( Fig. 29 H). Spermathecal capsule with small warts on outer surface (Pl. 6Q).

Description (♂, ♀). Head: Cibarium with 2−3 medial and 3−4 posterior sensilla per side.

Thorax (Pl. 3B): Postpronotum yellowish brown; scutum blackish brown, dorsocentrally with 4 blurry, pale, longitudinal stripes; scutellum blackish brown, with 1 pair of yellowish brown, longitudinal stripes near lateral margins; pleura pale brown.

Wing (Pl. 3B) hyaline; veins yellowish brown. C1 setae 2, subequal. Haltere pale yellow.

Legs (Pl. 3B) yellow.

Abdomen (Pl. 3B): Tergites each with broad, pale brown caudal band. Sternites pale yellow; male VI somewhat quadrate, slightly wider than long, nearly straight on posterior margin.

Male terminalia ( Fig. 29 A −F): Epandrium pubescent on dorsal 1/4 only, ventrally with ca. 15 long setae; caudoventral portion apically somewhat pointed, with ca. 23 short, stout setulae. Surstylus with 3 setae in addition to 2 stout, upturned prensiseta at and above caudodorsal corner, 5 apically converging prensisetae along distal margin and 2 short setae near ventral apex. Cercus sparsely pubescent in small patch on anteromedial portion, with ca. 17 long setae. Hypandrium somewhat triangular, 2/3 as wide as long. Gonopod apically somewhat triangular, moderately protruded. Paramere distally somewhat triangular in lateral view, shorter than twice of width, with 7 sensilla. Aedeagal basal process 2/3 as long as paramere.

Female terminalia ( Fig. 29 G, H; Pl. 6Q): Oviscapt valve gently curved on dorsosubapical margin and less expanded dorsomedially in lateral view, with 5−6 dorsal ovisensilla, 10 lateral ones in slightly convex (in ventral view) row on apicolateral portion and 8−9 distally slightly increasing in size on distally concave, ventral margin. Spermathecal capsule brown; introvert depth of duct about 1/2 of capsule height.

Measurements: BL = 2.20 (1♂ paratype: 2.04; 2♀ paratypes: 2.07−2.31) mm, ThL = 1.06 (1.01; 1.08−1.11) mm, WL = 2.45 (2.42; 2.50−2.55) mm, WW = 1.08 (1.04; 1.11−1.12) mm.

Indices: arb = 2/1 (1♂, 2♀ paratypes: 2/1), FW/HW = 0.43 (0.44−0.46), ch/o = 0.13 (0.10−0.15), prorb = 0.94 (0.84−0.93), rcorb = 0.63 (0.61−0.68), orbito = 1.00 (0.94−1.02), vb = 0.40 (0.38−0.44), dcl = 0.53 (0.51−0.59), dcp = 0.35 (0.33−0.40), sterno = 0.67 (0.62−0.66), m-sterno = 0.76 (0.74−0.79), sctl = 1.01 (0.97−1.10), sctlp = 1.21 (0.97−1.22), C = 2.57 (2.27−2.60), 4c = 0.87 (0.82−0.91), 4v = 1.68 (1.56−1.62), 5x = 1.74 (1.57−1.74), ac = 2.71 (2.58−2.84), M = 0.50 (0.46−0.51).

Holotype. ♂ (#00309), along the way from Lage Village, Baiba Town, Linzhi County to Hanmi Village, Beibeng Town, Motuo County, Linzhi District, Xizang, China, 25.ix.2010, ex Impatient desmantha Hook. f. ( Fig. 1 C), J.J. Gao ( KIZ).

Paratypes. CHINA: 1♀ (#00542), same data as holotype; 1♀ (#00312), Hanmi, Beibeng, Motuo, Xizang, 26.ix.2011, ex Impatiens sp. aff. bahanensis Hand.-Mazz. ( Fig. 1 B), J.J. Gao; 1♂ (#03716). Huangcaoling, Jinping Town, Jingdong County, Yunnan, 24º22.501´N, 100º46.141´E, ca. 2100 m, 1.ix.2014, ex Impatiens racemosa DC. ( Fig. 1 F), J.J. Gao, M.J. Toda ( KIZ).

Distribution. China (Yunnan, Xizang).

Etymology. Referring to the distally forceps-like (forceps) oviscapt valve (valva).

Figures

FIGURE 1. Flowers from which some of the BVD (Impatiophila gen. nov.) flies employed in the present study were collected. Sites of photographing are given in parentheses (see Fig. 2 for detailed information about each site). A, Impatiens siculifer Hook. f. (site 3); B, Impatiens sp. aff. bahanensis Hand. - Mazz (site 2); C, Impatient desmantha Hook. f. (site 1), D, Impatiens arguta Hook. f. et. Thoms. (site 4); E, Impatiens radiata Hook. f. (site 10); F, Impatiens racemosa (site 17); G, Gesneriaceae sp. 1 (site 22); H, Impatiens siculifer Hook. f. (site 6); I, Impatiens uniflora Hayata (site 23); J, Gesneriaceae sp. 2 (site 6).

FIGURE 29. Impatiophila forcipivalva Fu & Gao, sp. nov. Adult male (holotype, # 00309) and female (paratype, # 00312): A, periphallic organs (caudolateral view); B, caudoventral part of epandrium; C, surstylus (caudal view); D, tenth sternite; E, phallic organs (dorsal view); F, phallic organs (lateral view); G, oviscapt (lateral view); H, oviscapt (ventral view).